A years-old conflict between security guards stationed outside Mark Zuckerberg’s Liberty Hill home and a transient neighborhood resident flared up again on June 10, when William Gordon Kinzer was arrested and booked for driving without a license, violating a court order and being involved in a hit-and-run incident.

Now, San Francisco Chronicle columnists Matier & Ross report that it was Kinzer allegedly driving menacingly at the guards and clipping another car that led to his arrest in June.

The columnists go on to report that two of the guards working the day Kinzer was arrested are former Oakland Police Department officers with troubled histories at that department. They will not be testifying at Kinzer’s court date, the columnists say, which has happened before.

Kinzer is scheduled to go to court August 4 at 9 a.m., according to Sheriff’s Department records.